Glossary

The words, without the shrug

Every term the courses use, defined in one line and then in a paragraph. Written to be read out of order.

Showing 1 of 2 matching “Join”

Join

Data & Databases

Answering a question that spans two tables.

Matching rows across tables using a key: orders with their customer names attached. Ordinary and fast when the columns involved are indexed, and very slow when they are not.

See also Foreign key, Index, Normalisation